Yes it is a 25 gallon. If i install a gate valve to control the flow would that work? Just wondering. Im trying to save some money i saw a new one on ebay for 57 + shipping.I have an overflow box....but if you have a 25 gallon like listed in the sub part of your post, it will be overkill. I had it on a 58 gallon tank and it could handle a much bigger tank. Later I find it and take pictures and see if I can determine whose it is. I also have a DIY durso to keep it running quiet. I'm looking to get 10 bucks.
LOL it's bigger then my tank! I can use it as a refugium at the same time.
I do want to drill the tank. but I'm afraid. I would even let somebody that knows what they're doing do it for me, for a nominal fee of course. But I'm to rough and I know I would break the whole thing.I think it might work, but also think it's way too big. I think you'd be better off drilling the tank, but that's me. However, I like your suggestion as an HOB refugium.....great size.